I guess most people interested in WW1 vehicles may have wondered how the multi-colour camouflage schemes were applied. These were often
3 or 4 colours often with delineating black lines. The paints of the time were slow drying and spray painting was very rare. There is an well known image of
woman workers painting a Saint-Chamond tank with each woman seeming to have pot of each colour used. The attached is from the Chandler Co. in 1918
painting camouflage on Holt 10-ton artillery tractors. They seemed to have marked out the pattern in chalk and the black lines are added once the blocks of colour are applied.
(I've added an image of the whole NARA card - I had to fiddle with the image to get in a format that the forum would accept)
